Crusher apparatus



June 28, 1966 G. w. BEHNKE 3,258,211

CRUSHER APPARATUS Filed Jan. 24, 1964 2 Sheets-Sheet l INVENTOR.

ATTORNEYS J1me 1966 G. w. BEHNKE 3,253,211

CRUSHER APPARATUS Filed Jan. 24, 1964 2 Sheets-Sheet 2 47 d INVENTOR.

33 earge ZZBeA/Me HTTORNEYS United States Patent "ice 3,258,211 CRUSHERAPPARATUS George W. Behnke, Durand, Mich, assignor to SimplicityEngineering Company, Durand, Mich, a corporation of Michigan Filed Jan.24, 1964, Ser. No. 339,947 8 Claims. (Cl. 241275) This invention relatesto crushing apparatus of the impact type for crushing various materialsand is a continuation-in-part of presently .pending application forCrusher Apparatus, filed December 26, 1961, Serial No. 162,075, nowPatent No. 3,170,645, Messrs. Behnke, Westcott and Wirth, inventors.

One of prime objects of the invention is to design a crushing apparatusfor crushing lightweight aggregates such as asbestos, shale, gravel,stone, coal, coke, limestone, and other materials of either wet or dryclassification providing high production and producing optimum volume offinished products at minimum cost.

Inasmuch as the material to be processed is of a highly abrasive nature,it is essential that all wear parts of the apparatus be protected asmuch as possible; that they be adjustable to compensate for wear andreversible to present fresh working surfaces, all to the end that theapparatus will continue to operate at high capacity With finishedproduct unaffected by heavy wear of working surfaces.

One of the prime objects of the invention is to design a crushingapparatus including a crushing bowl having a plurality of impact barsadjustably mounted therein, and provide means for reinforcing andholding the impact bars solidly in set position, so that the materialflung outwardly against the bars will be uniformly shattered, and inwhich the volume of fines can be accurately controlled by merelychanging the speed of the impeller assembly to control the speed oftravel of the material flung from the impeller. Another object of theinvention is to design a crushing apparatus including an impellerprovided with circumferentially spaced apart buckets and provide aplurality of wear pins and members adjacent to and connected with saidbuckets for protecting them from excessive wear caused by pieces of thematerial flung by the impeller ricocheting from the impact bars backagainst the back wall of the buckets, causing heavy wear and frequent replacement at high cost, and considerable down time for the apparatus.

A further object is to provide a crushing apparatus including a drivenimpeller and impact bars against which the material is flung, andprovide easily accessible means for adjusting said impact bars, togetherwith means for preventing escape of dust from the bowl when theapparatus is in operation.

Still a further object is to provide a modified impeller constructionwhich mimizes wear and presents a minimum of individual pieces andprojections exposed to the action of the material.

A further object still is to design a crushing apparatus which crushesand fiberizes asbestos, retaining longer fibers and producing less finesat lower cost and with less maintenance and down time.

With the above and other objects in view, the present invention consistsin the combination and arrangement of parts, hereinafter more fullydescribed, illustrated in the accompanying drawings, and particularlypointed out in the appended claims; it being understood that changes maybe made in the form, size, proportion and minor details of construction,without departing from the spirit, or sacrificing any of the advantagesof the invention.

In the drawings:

FIGURE 1 is a vertical, sectional view through our crushing apparatus.

Patented June 28, 1966 FIGURE 2 is a top plan view thereof, with thecover broken away to more clearly show the construction.

FIGURE 3 is an enlarged plan view of the impeller, parts being brokenaway to show the wear pins and plates.

FIGURE 4 is a sectional, edge elevational view of the impeller.

FIGURE 5 is a perspective view of one of the Wear plate sections.

Referring now more specifically to the drawings wherein like parts aredesignated by the same numerals throughout the various views.

The crushing apparatus comprises a cylindrical bowl or shell S mountedon elongated supports 10 on which a motor M is adjustably mounted fordriving an impeller 11 mounted on a vertical shaft 12 which is journaledin a bearing 14 provided on said supports by means of a drive belt 15 orthe like. The upper end of the bowl is open and a cover 16 forms aclosure therefor, said cover having a centrally disposed opening 17which accommodates the spout 18 of the material hopper 19 from which thematerial to be crushed flows to the impeller, and the lower end of thebowl is also open as usual to permit discharge of the crushed materialspassing through the apparatus.

The lower end section 20 of the crushing bowl is of smaller diameterthan the upper, and extends a predetermined distance thereinto as shownin FIGURE 1 of the drawings and passages 21 are provided in the lowerend of section 20 to accommodate the supports 10 which ex tendtherethrough. The upper enlarged bowl section 22 contains the crushingsection of the apparatus, and the impeller 11 is mounted therein, saidimpeller comprising vertically spaced apart upper and lower flat endsections 23 and 24, respectively, the section 24 having a centrallydisposed opening 25 in which a hub member 26 is welded as shown. A wearplate 27 is disposed in facial contact with the plate 24 and is alsowelded to the hub 26 and to plate 24 respectively.

Cast abrasive resistance plate sections 28 are bolted to the upper faceof plate 24, and are formed with a rim section 29 to protect theperipheral edge of the plate 24, said wear plate sections being shapedas clearly shown in FIGURE 5 of the drawings, and bolts 30 are providedto secure the plate sections 28 in position.

A center cap 31 is mounted on the upper end of drive shaft 12 by meansof bolts 32 and overlies the openings 28a provided in plates 28, and theshaft 12 is further keyed to the hub as at 33 to provide a secureconnection thereat.

The upper end of the impeller is of substantially the same constructionas the lower, the cast sections 34 being formed of an abrasiveresistance material and are formed with a rim section 35 grooved as at36 to accommodate and protect the rim of the plate 23. Bosses 37 arewelded to the upper face of plate 23 in spaced relation, and bolts 38are also provided for securing the sections 34 in position, said bossesbeing bored as at 39 to accommodate the nut 40.

These cast abrasive resistant wear plates 34 are subject to intensivewear and are so mounted that they can be quickly removed and replacedwhen necessary. A centrally disposed opening 41 is provided in the uppersection 23 to accommodate the spout 18 of the material hopper 19, and aplurality of circumferentially spaced apart buckets B form a part of theimpeller assembly, each bucket comprising a vertically disposed section42 preferably substantially triangular in cross section, with the upperend lower edges welded to the upper and lower plates 23 and 24 of theimpeller, and hardened wear pins 43 and 44 are mounted in suitableopenings 45 provided in the plates 23 and 24, said pins being turned asat 46 and are located at the outer and inner end of the bucket sectionto form the tip and rear end of the bucket, the

lower plate 27 having properly located openings 47 to accommodate theturned end section 46 of the pins.

T o shield and prevent excessive wear on the impeller parts and bucketsB due to materials ricocheting from the impact bars X, I provide spacedapart wear pins 48 positioned as shown, which pins are also shoulderedthe same as pins 43 and 44 to fit suitable openings (not shown) providedin the impeller and wear plates, respectively, and an abrasive resistantplate 50 is provided on the back face of the bucket to reinforce andshield same.

The impeller wear pin locking means comprises a plate 51 having slottedopenings 52 therein which accommodate bolts 53, said plate being soshaped that when in locked position, it overlaps a section of the endsof the wear pins, and when the bolts 53 are loosened, the plate 51 canbe shifted to clear the individual pins to permit easy and quick removalthereof.

A plurality of impact bar accommodating openings 54 are provided in theside wall of the enlarged section of the bowl, and a radially extendinghousing 56 forms an extension as shown, the impact bars X beingaccommodated in said housings and bear on upper edge of the verticalbowl skirt 20 and the lower wail of the openings 54, and a cover 57forms a closure for the open end of each housing with bolts 58 tofacilitate easy removal.

The stream of material flung by the impeller buckets is highly abrasive,and to provide a solid mounting for each impact bar and still permitready adjustment, I provide a vertically disposed flat back-up plate 59mounted in the shell, said plate projecting inwardly at an angle towardsthe impeller with its outer edge welded to the bowl Wall as shown. Ahorizontally disposed brace bar 60 spans the back-up plates a and isWelded to the upper edges thereof. Another brace 61 is welded to thevertical backup plate 59 and to the wall of the bowl to provide a rigidmounting and arrangement for the impact bars. A threaded locking bolt 62is provided on each brace bar 60 and is adjustable against the upperface of the impact bar X to lock it in set position, and by backing offthe bolt 62, the bars can then be adjusted as desired, after which thebolt 62 is tightened to rigidly lock the bar in position. Each impactbar is secured in exactly the same manner and any one or more bars canbe readily adjusted, removed, and/or replaced, as desired. The impactbars X are also reversible end-for-end and side-forside to providemaximum wearing surface prior to the necessity of inserting new bars.

T o adjust or remove one of the impact bars, it is merely necessary toloosen the bolts 58, remove the end cover 57 which forms a closure forthe housing, and then adjust or remove and replace the impact bar X asdesired, after which the bolt 62 is again tightened, the cover plate 57is then applied, and the adjustment or replacement is complete.

The wear pins 43, 44, and 48 can likewise be readily adjusted to presenta new wearing surface by merely rotating to present a fresh workingarea, or they can be readily removed for replacement with a new pin whennecessary. To adjust or remove, the operator merely removes the wedgepins 63 from the eyes 64 on the cover 16, this permits the hand holdcover 65 to be removed, the impeller is then rotated to bring itdirectly beneath the hand hold opening 66, after which the bolts 53 areloosened to permit adjustment of the locking plate 51 so that the Wearpins can be either adjusted, or removed and replaced, the locking plate51 is then moved back to locked position, bolts 53 are again tightened,and the apparatus is now ready for operation.

In apparatus of the instant nature where highly abrasive material istreated to provide a product of the desired size, etc., it is extremelyimportant that the parts subjected to intense wear be readily adjustableand/or readily replaceable with a minimum of labor and in a relativelyshort period of time, and also that the apparatus be constructed toeliminate excessive dust due to the crushing operation, and this I haveaccomplished in the instant construction.

Under normal crushing operations the complete impeller is subjected tointense wear due to frictional contact of the material being receivedand flung therefrom and further due to the material ricocheting from theimpact bars X against the end wall and back face surface of the bucketsB. I, therefore, secure abrasive wear plates 50 in position shown toprotect the back section of the buckets, and the pins 48 are so locatedas to protect the angularly disposed outer end face of said buckets.

From the foregoing description, it will obvious that I have perfected avery simple, practical and relatively inexpensive crushing apparatus forcrushing materials of all kinds.

I claim:

1. A central crusher comprising; bowl mean-'s; rotatable impeller meansrotatably mounted within the bowl means; means for driving said impellermeans; housing means extending outwardly from said bowl means; generallyradially extending impact members in said bowl in circ-umferentiallyspaced relation around said impeller means; said bowl means havingopenings through which said impact members extend into said housingmeans; said housing means having circumferentially spaced openingsthrough which said impact members may be withdrawn; removable covermeans for said latter openings; and means for releasably securing saidimpact members in position.

2. A centrifugal crusher comprising; bowl means; rotatable impellermeans rotatably mounted within the bowl means; means for driving saidimpeller means, circumferentially spaced housing members extendingoutwardly from said bowl means and having openings in the outer facethereof; radially extending impact bars in said bowl incircumferentially spaced relation around said impeller means; back-upplates in said bowl; said bowl means having openings through which saidimpact bars extend into said housing members and through which saidimpact bars can be withdrawn; removable covers for said openings in thehousing members, and means for releasably securing said impact membersin position.

3. The combination defined in claim 2 in which means is provided formounting said impact bars in various radial positions, and individualbars connecting the inner end of one back-up plate with the adjacentback-up plate.

4. A centrifugal crusher comprising; a bowl; shaft means therein; meansfor driving said shaft means in a direction of rotation; rotatableimpeller means within the bowl and driven by said shaft means; spacedapart buckets opening in the direction of rotation of said shaft meansmounted on said propeller means; said buckets being formed withgenerally axially parallel replaceable wear members; a radially disposedmember axially adjacent the buckets to close the sides thereof; saidradially disposed member having openings configured to permit removal ofsaid wear members theret-hrough, and liner plate means releasablysecured on the side of said radially disposed member adjacent thebuckets and having openings in alignment with the openings in saidradially disposed member to pass said Wear members.

5. A centrifugal crusher comprising: a bowl; shaft means therein; meansfor driving said shaft means in a direction of rotation; rotatableimpeller means within said bowl and driven by said shaft means; spacedapart buckets opening in the direction of ratation of said shaft meansmounted on said impeller means; radially disposed member axiallyadjacent the buckets to close the sides thereof; and a plurality ofsegment liner plates releasably secured on the side of said radiallydisposed member adjacent the buckets.

6. The combination defined in claim 5 in which lips are provided on theliner plates, said lips covering the peripheral edges of the radiallydisposed members.

7. The combination set forth in claim 5 in Wihch the segment plates arespaced circumferentially from one another by said buckets.

8. A centrifugal crusher comprising; bowl means; an impeller rotatablymounted in said bowl means; means for driving said impeller in adirection of rotation, generally radially extending impact bar means insaid bowl means in circumferentially spaced relation around saidimpeller means; back up plate means for said impact bar means extendinggenerally parallel therewith on the back side of said impact bar meansrelative to said direction of rotation, and brace means rigidlyconnecting said back up plate means around the periphery of said bowlmeans inward of said bowl means.

References Cited by the Examiner UNITED STATES PATENTS 1,857,539 5/1932Hadsel 241275 2,991,949 7/1961 Sellars 241275 2,992,783 7/1961 Wirth eta1. 24l275 2,992,784 7/ 1961 Behnke et a1 241275 3,044,720 7/1962Bridgewater 241275 ROBERT C. RIRDON, Primary Examiner.

WILLIAM W. DYER, JR., LESTER M. SWINGLE,

Examiners.

D. L. MAXSON, D. KELLY, Assistant Examiners.

1. A CENTRAL CRUSHER COMPRISING; BOWL MEANS; ROTATABLE IMPELLER MEANS ROTATABLY MOUNTED WITHIN THE BOWL MEANS; MEANS FOR DRIVING SAID IMPELLER MEANS; HOUSING MEANS EXTENDING OUTWARDLY FROM SAID BOWL MEANS; GENERALLY RADIALLY EXTENDING IMPACT MEMBERS IN SAID BOWL IN CIRCUMFERENTIALLY SPACED RELATION AROUND SAID IMPELLER MEANS; AND BOWL MEANS HAVING OPENINGS THROUGH WHICH SAID IMPACT MEMBERS EXTEND INTO SAID HOUSING MEANS; SAID HOUSING MEANS HAVING CIRCUMFERENTIALLY SPACED OPENINGS THROUGH WHICH SAID IMPACT MEMBERS MAY BE WITHDRAWN; REMOVABLE COVER MEANS FOR SAID LATTER OPENINGS; AND MEANS FOR RELEASABLY SECURING SAID IMPACT MEMBERS IN POSITION. 